EP 1690608 A1 20060816 - Method and apparatus for the manufacture of pipes
Title (en)
Method and apparatus for the manufacture of pipes
Title (de)
Verfahren und Vorrichtung zur Herstellung von Rohren
Title (fr)
Procédé et dispositif pour la fabrication de tuyaux
Publication
Application
Priority
DE 102005006579 A 20050211
Abstract (en)
Production of tubes comprises providing sheet metal plates (2) with contact bumps (9) suitable for a resistance welding process before deformation along longitudinal sides (7, 8) to be joined together. The upper tool (6) used for the deformation has electrically insulated electrode strips (11, 12) in the region of the longitudinal sides via which an electrical current is passed into the longitudinal sides while maintaining a pressing force of the upper tool and a lower tool. The contact bumps are welded to the longitudinal sides by the pressing pressure and the welding heat produced. An independent claim is also included for a device for producing tubes.
IPC 8 full level
B21C 37/08 (2006.01); B23K 11/087 (2006.01); B23K 33/00 (2006.01)
CPC (source: EP US)
B21C 37/0815 (2013.01 - EP US); B21C 37/0826 (2013.01 - EP US); B21C 37/157 (2013.01 - EP US); B23K 11/0873 (2013.01 - EP US); B23K 33/006 (2013.01 - EP US); B23K 2101/06 (2018.07 - EP US)
Citation (search report)
- [XA] FR 2350154 A1 19771202 - SCIAKY INTERTECHNIQUE [CH]
- [A] GB 1556544 A 19791128 - FLETCHER SUTCLIFFE WILD LTD
- [A] US 1354593 A 19201005 - BELMONT HARRY H
- [A] US 1363161 A 19201221
- [A] PATENT ABSTRACTS OF JAPAN vol. 016, no. 217 (M - 1252) 21 May 1992 (1992-05-21)
- [A] PATENT ABSTRACTS OF JAPAN vol. 011, no. 157 (M - 590) 21 May 1987 (1987-05-21)
Designated contracting state (EPC)
CZ ES FR IT
DOCDB simple family (publication)
DE 102005006579 B3 20060330; EP 1690608 A1 20060816; EP 1690608 B1 20090909; ES 2331200 T3 20091223; US 2006179769 A1 20060817
DOCDB simple family (application)
DE 102005006579 A 20050211; EP 06000898 A 20060117; ES 06000898 T 20060117; US 35295306 A 20060213